Re: [CAD_CAM_EDM_DRO] Hurco KM-3 retrofit

Ron Thompson wrote:

> Thanks, Jon.
> The servo drives are bare boards inside the cabinet. There is a label
> that says Servomate and 90 VDC.
> The problem is which pins to use?
>

OK, I don't know this model, but a quick check turned up some info :
http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Servomate
A good bit of info is in the document linked there.

Seeing as these units may be as much as 30 years old, and use either a 5
KHz or 2 KHz
switching frequency, you may want to re-think using them. I see
something that
suggests this might be a sign-magnitude scheme, so maybe it doesn't
"sing" to badly
when idle. I know some of the early PWM drives produce a maddening whine.

Jon